Malicious PDF — malware analysis report

Static analysis result for SHA-256 53687fc6107d9f28…

MALICIOUS

PDF

37.6 KB Created: 2020-11-09 16:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 48424a351069ee63f4a96961dbeb7a8d SHA-1: e53147729605054bcbe72dc054c4e91fdb431322 SHA-256: 53687fc6107d9f28d2b32648d90ebc55dd855d42b40fa10bd4a43d3f11a0bc73
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/aws?keyword=bissell+powerforce+powerbrush+parts+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411483/normal_5f9a1197ef6a5.pdfIn PDF document text
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/6820042.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/wuzeva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f875fe8e5ec9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423136/normal_5f9a32a22e18c.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/folutudipafej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5fa45a03608bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000465f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000465f.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00007912.bin)
    • https://s3.amazonaws.com/tenunud/gmod_game_free_play_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123acb8a-b427-4249-97cf-f6b7709fec74/oxymoron_in_of_mice_and_men.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0fe8327-802d-4b10-9d2a-e3a1ee0e0cf4/zadalugasefile.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/sobrecrecimiento_bacteriano_tratamiento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6532986e-b023-49d1-ab8e-c9452487f0f2/69209191675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21773c5b-0a98-4be5-a792-bf0ad88aa7ae/babubori.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off0000465f.bin)

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000465f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x465F 5420 bytes
SHA-256: 41a8e88f30b8a5ff68201ad50b1bf44f8005419147279dcd221d9efc44a84ec0
font_01_sfnt_off000058ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58AD 9460 bytes
SHA-256: 1241a76652edcfe5b308d931e9d27c715b9e08b5d068f61e5b860b78d8182d65
font_02_sfnt_off00007912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7912 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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